atzsc.c revision 1.31
1 /* $NetBSD: atzsc.c,v 1.31 2002/01/28 09:56:51 aymeric Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 5 * Copyright (c) 1982, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)dma.c 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: atzsc.c,v 1.31 2002/01/28 09:56:51 aymeric Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 #include <dev/scsipi/scsi_all.h> 47 #include <dev/scsipi/scsipi_all.h> 48 #include <dev/scsipi/scsiconf.h> 49 #include <amiga/amiga/custom.h> 50 #include <amiga/amiga/cc.h> 51 #include <amiga/amiga/device.h> 52 #include <amiga/amiga/isr.h> 53 #include <amiga/dev/dmavar.h> 54 #include <amiga/dev/sbicreg.h> 55 #include <amiga/dev/sbicvar.h> 56 #include <amiga/dev/atzscreg.h> 57 #include <amiga/dev/zbusvar.h> 58 59 void atzscattach(struct device *, struct device *, void *); 60 int atzscmatch(struct device *, struct cfdata *, void *); 61 62 void atzsc_enintr(struct sbic_softc *); 63 void atzsc_dmastop(struct sbic_softc *); 64 int atzsc_dmanext(struct sbic_softc *); 65 int atzsc_dmaintr(void *); 66 int atzsc_dmago(struct sbic_softc *, char *, int, int); 67 68 #ifdef DEBUG 69 void atzsc_dump(void); 70 #endif 71 72 #ifdef DEBUG 73 int atzsc_dmadebug = 0; 74 #endif 75 76 struct cfattach atzsc_ca = { 77 sizeof(struct sbic_softc), atzscmatch, atzscattach 78 }; 79 80 /* 81 * if we are an A3000 we are here. 82 */ 83 int 84 atzscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 85 { 86 struct zbus_args *zap; 87 88 zap = auxp; 89 90 /* 91 * Check manufacturer and product id. 92 * I was informed that older boards can be 2 also. 93 */ 94 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 95 return(1); 96 else 97 return(0); 98 } 99 100 void 101 atzscattach(struct device *pdp, struct device *dp, void *auxp) 102 { 103 volatile struct sdmac *rp; 104 struct sbic_softc *sc = (struct sbic_softc *)dp; 105 struct zbus_args *zap; 106 struct scsipi_adapter *adapt = &sc->sc_adapter; 107 struct scsipi_channel *chan = &sc->sc_channel; 108 109 zap = auxp; 110 111 sc->sc_cregs = rp = zap->va; 112 /* 113 * disable ints and reset bank register 114 */ 115 rp->CNTR = CNTR_PDMD; 116 rp->DAWR = DAWR_ATZSC; 117 sc->sc_enintr = atzsc_enintr; 118 sc->sc_dmago = atzsc_dmago; 119 sc->sc_dmanext = atzsc_dmanext; 120 sc->sc_dmastop = atzsc_dmastop; 121 sc->sc_dmacmd = 0; 122 123 /* 124 * only 24 bit mem. 125 */ 126 sc->sc_flags |= SBICF_BADDMA; 127 sc->sc_dmamask = ~0x00ffffff; 128 #if 0 129 /* 130 * If the users kva space is not ztwo try and allocate a bounce buffer. 131 * XXX this needs to change if we move to multiple memory segments. 132 */ 133 if (kvtop(sc) & sc->sc_dmamask) { 134 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 135 if (isztwomem(sc->sc_dmabuffer)) 136 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 137 else if (sc->sc_dmabuffer) 138 printf(" bounce pa 0x%x", 139 PREP_DMA_MEM(sc->sc_dmabuffer)); 140 } 141 #endif 142 sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 143 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 144 145 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 146 147 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 148 149 /* 150 * Fill in the scsipi_adapter. 151 */ 152 memset(adapt, 0, sizeof(*adapt)); 153 adapt->adapt_dev = &sc->sc_dev; 154 adapt->adapt_nchannels = 1; 155 adapt->adapt_openings = 7; 156 adapt->adapt_max_periph = 1; 157 adapt->adapt_request = sbic_scsipi_request; 158 adapt->adapt_minphys = sbic_minphys; 159 160 /* 161 * Fill in the scsipi_channel. 162 */ 163 memset(chan, 0, sizeof(*chan)); 164 chan->chan_adapter = adapt; 165 chan->chan_bustype = &scsi_bustype; 166 chan->chan_channel = 0; 167 chan->chan_ntargets = 8; 168 chan->chan_nluns = 8; 169 chan->chan_id = 7; 170 171 sbicinit(sc); 172 173 sc->sc_isr.isr_intr = atzsc_dmaintr; 174 sc->sc_isr.isr_arg = sc; 175 sc->sc_isr.isr_ipl = 2; 176 add_isr (&sc->sc_isr); 177 178 /* 179 * attach all scsi units on us 180 */ 181 config_found(dp, chan, scsiprint); 182 } 183 184 void 185 atzsc_enintr(struct sbic_softc *dev) 186 { 187 volatile struct sdmac *sdp; 188 189 sdp = dev->sc_cregs; 190 191 dev->sc_flags |= SBICF_INTR; 192 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 193 } 194 195 int 196 atzsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 197 { 198 volatile struct sdmac *sdp; 199 200 sdp = dev->sc_cregs; 201 /* 202 * Set up the command word based on flags 203 */ 204 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 205 if ((flags & DMAGO_READ) == 0) 206 dev->sc_dmacmd |= CNTR_DDIR; 207 #ifdef DEBUG 208 if (atzsc_dmadebug & DDB_IO) 209 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 210 #endif 211 212 dev->sc_flags |= SBICF_INTR; 213 sdp->CNTR = dev->sc_dmacmd; 214 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 215 sdp->ST_DMA = 1; 216 217 return(dev->sc_tcnt); 218 } 219 220 void 221 atzsc_dmastop(struct sbic_softc *dev) 222 { 223 volatile struct sdmac *sdp; 224 int s; 225 226 sdp = dev->sc_cregs; 227 228 #ifdef DEBUG 229 if (atzsc_dmadebug & DDB_FOLLOW) 230 printf("atzsc_dmastop()\n"); 231 #endif 232 if (dev->sc_dmacmd) { 233 s = splbio(); 234 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 235 /* 236 * only FLUSH if terminal count not enabled, 237 * and reading from peripheral 238 */ 239 sdp->FLUSH = 1; 240 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 241 ; 242 } 243 /* 244 * clear possible interrupt and stop dma 245 */ 246 sdp->CINT = 1; 247 sdp->SP_DMA = 1; 248 dev->sc_dmacmd = 0; 249 splx(s); 250 } 251 } 252 253 int 254 atzsc_dmaintr(void *arg) 255 { 256 struct sbic_softc *dev = arg; 257 volatile struct sdmac *sdp; 258 int stat, found; 259 260 sdp = dev->sc_cregs; 261 stat = sdp->ISTR; 262 263 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 264 return (0); 265 266 #ifdef DEBUG 267 if (atzsc_dmadebug & DDB_FOLLOW) 268 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 269 #endif 270 271 /* 272 * both, SCSI and DMA interrupts arrive here. I chose 273 * arbitrarily that DMA interrupts should have higher 274 * precedence than SCSI interrupts. 275 */ 276 found = 0; 277 if (stat & ISTR_E_INT) { 278 found++; 279 280 sdp->CINT = 1; /* clear possible interrupt */ 281 282 /* 283 * check for SCSI ints in the same go and 284 * eventually save an interrupt 285 */ 286 } 287 288 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 289 found += sbicintr(dev); 290 return(found); 291 } 292 293 294 int 295 atzsc_dmanext(struct sbic_softc *dev) 296 { 297 volatile struct sdmac *sdp; 298 299 sdp = dev->sc_cregs; 300 301 if (dev->sc_cur > dev->sc_last) { 302 /* shouldn't happen !! */ 303 printf("atzsc_dmanext at end !!!\n"); 304 atzsc_dmastop(dev); 305 return(0); 306 } 307 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 308 /* 309 * only FLUSH if terminal count not enabled, 310 * and reading from peripheral 311 */ 312 sdp->FLUSH = 1; 313 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 314 ; 315 } 316 /* 317 * clear possible interrupt and stop dma 318 */ 319 sdp->CINT = 1; /* clear possible interrupt */ 320 sdp->SP_DMA = 1; /* stop dma */ 321 sdp->CNTR = dev->sc_dmacmd; 322 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 323 sdp->ST_DMA = 1; 324 325 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 326 return(dev->sc_tcnt); 327 } 328 329 #ifdef DEBUG 330 void 331 atzsc_dump(void) 332 { 333 extern struct cfdriver atzsc_cd; 334 int i; 335 336 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 337 if (atzsc_cd.cd_devs[i]) 338 sbic_dump(atzsc_cd.cd_devs[i]); 339 } 340 #endif 341
Indexes created Tue Sep 30 20:09:53 GMT 2025